Enantiomerically enriched, polycrystalline molecular sieves
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Chemical Engineering
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Chemical Engineering; Univ. of Utrecht (Netherlands). Debye Inst. for Nanomaterials Science
- Rice Univ., Houston, TX (United States). Dept. of Bioengineering and Dept. of Physics and Astronomy
- ShanghaiTech Univ. (China). School of Physical Science and Technology
- ShanghaiTech Univ. (China). School of Physical Science and Technology; Stockholm Univ. (Sweden). Dept. of Materials and Environmental Chemistry
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Chemical Engineering; Stanford Univ., CA (United States). Dept. of Chemical Engineering
Zeolite and zeolite-like molecular sieves are being used in a large number of applications such as adsorption and catalysis. Achievement of the long-standing goal of creating a chiral, polycrystalline molecular sieve with bulk enantioenrichment would enable these materials to perform enantioselective functions. Here, we report the synthesis of enantiomerically enriched samples of a molecular sieve. For this study, enantiopure organic structure directing agents are designed with the assistance of computational methods and used to synthesize enantioenriched, polycrystalline molecular sieve samples of either enantiomer. Computational results correctly predicted which enantiomer is obtained, and enantiomeric enrichment is proven by high-resolution transmission electron microscopy. The enantioenriched and racemic samples of the molecular sieves are tested as adsorbents and heterogeneous catalysts. The enantioenriched molecular sieves show enantioselectivity for the ring opening reaction of epoxides and enantioselective adsorption of 2-butanol (the R enantiomer of the molecular sieve shows opposite and approximately equal enantioselectivity compared with the S enantiomer of the molecular sieve, whereas the racemic sample of the molecular sieve shows no enantioselectivity).
- Research Organization:
- Rice Univ., Houston, TX (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); California Inst. of Technology (CalTech), Pasadena, CA (United States); Chevron Corporation, San Ramon, CA (United States); ShanghaiTech Univ. (China)
- Grant/Contract Number:
- FG02-03ER15456
- OSTI ID:
- 1429468
- Journal Information:
- Proceedings of the National Academy of Sciences of the United States of America, Vol. 114, Issue 20; ISSN 0027-8424
- Publisher:
- National Academy of Sciences, Washington, DC (United States)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Enantiomerically enriched, polycrystalline molecular sieves
Enantioselective analysis and enantiomeric bias of atropisomeric PCBs